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Secure double-entry transaction engine with threshold alert rules protecting account ledgers under heavy load.
A robust double-entry transaction engine enforcing strict ACID consistency for user transactions. Features transaction volume rate-limiting and location mismatch alerts to flag anomalous account activity.
Preventing race conditions where multiple rapid transactions could result in negative balances.
Enforced database-level pessimistic locks (`SELECT FOR UPDATE`) on account rows during transaction balance processing.
Designed double-entry schema preserving balance consistency under heavy load concurrent tests.
Integrated JSON Web Tokens (JWT) and multi-factor authorization safeguards.
Optimized query performance using indexes and stored transaction procedures.
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